ClearMarket

jdsource/clearmarket

Prediction markets across Polymarket and Kalshi share events but use different question structures, unnamed resolution sources, and no cross-venue linking. This server gives you graded, structured reference data: six MCP tools exposing events, markets, upcoming catalysts, and a daily signal feed. Every market carries a Resolution Clarity Grade (A/B/C), named resolution source with arbitration model, and cross-venue claim links via shared question IDs. Open and read-only, no auth required. Useful when you're building on prediction market data and need canonical event groupings, resolution provenance, or price comparisons across venues without writing your own normalization layer. Also ships REST endpoints, JSON-LD, and an llms.txt manifest.

GitHub stars: 3
tools: 6
transport: HTTP
last updated: Jun 9, 2026

View on GitHub

Install

From registry metadata

$ npx add-mcp https://api.clearmarket.fyi/mcp --name clearmarket

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

$ claude mcp add --transport http clearmarket https://api.clearmarket.fyi/mcp

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 6 tools

Verified live against the running server on Nov 6, 2026.

list_eventsBrowse or search ClearMarket prediction-market events. Filter by category, platform, Resolution Clarity Grade, or free-text `q`. `q` is token-AND across question + tags, so SHORT KEYWORD queries match best ("microstrategy bitcoin", "fed rate") — natural-language phrases often...6 params

Browse or search ClearMarket prediction-market events. Filter by category, platform, Resolution Clarity Grade, or free-text `q`. `q` is token-AND across question + tags, so SHORT KEYWORD queries match best ("microstrategy bitcoin", "fed rate") — natural-language phrases often...

Parameters* required

categorystring

one of economics · financials · crypto · companies · technology · politics

gradestring

Resolution Clarity Grade of the primary market.one of A · B · C

limitinteger

default: 50

offsetinteger

default: 0

platformstring

one of kalshi · polymarket

qstring

Free-text search across event questions. Omit to list the whole filtered universe.

get_eventFetch the full ClearMarket record for one event by slug: the canonical question, every market in this event's single-venue bundle, each market's current price + Resolution Clarity Grade (A/B/C) + resolution-source provenance, the canonical question_id where the question is lin...2 params

Fetch the full ClearMarket record for one event by slug: the canonical question, every market in this event's single-venue bundle, each market's current price + Resolution Clarity Grade (A/B/C) + resolution-source provenance, the canonical question_id where the question is lin...

Parameters* required

detailstring

concise = essentials only (grade, price, source, also_on per market); full = the complete record. Default full.one of concise · fulldefault: full

slug*string

Event slug (e.g. "kxgdpyear-26") or CM event id (CM-EVT-…).

get_marketFetch one market and judge whether its price can be trusted. Accepts whatever id you have: a ClearMarket id (CM-MKT-…), a venue-native market id or Kalshi ticker, or a market URL (best-effort — Kalshi tickers / a native id in the path resolve; for Polymarket pass the condition...1 params

Fetch one market and judge whether its price can be trusted. Accepts whatever id you have: a ClearMarket id (CM-MKT-…), a venue-native market id or Kalshi ticker, or a market URL (best-effort — Kalshi tickers / a native id in the path resolve; for Polymarket pass the condition...

Parameters* required

market_id*string

A ClearMarket id (CM-MKT-…), a venue-native market id / Kalshi ticker, or a market URL (best-effort: Kalshi URLs resolve; for Polymarket pass the conditionId).

list_upcoming_catalystsList scheduled catalysts (CPI, jobs, FOMC, GDP, large-cap earnings) in the next N days that move prediction-market prices BEFORE those markets resolve — a cross-event view across the whole calendar. Each entry is provenanced to its authoritative source (BLS, Fed, etc.). Use to...1 params

List scheduled catalysts (CPI, jobs, FOMC, GDP, large-cap earnings) in the next N days that move prediction-market prices BEFORE those markets resolve — a cross-event view across the whole calendar. Each entry is provenanced to its authoritative source (BLS, Fed, etc.). Use to...

Parameters* required

daysinteger

default: 30

list_signalsBrowse the CM Signal daily wire — short, structured prediction-market bulletins (the price is the lede, news is context). Filter by event_id (every wire touching a specific event), category, venue, or detection type (news_cycle, cross_venue_divergence, benchmark_drift, volume_...5 params

Browse the CM Signal daily wire — short, structured prediction-market bulletins (the price is the lede, news is context). Filter by event_id (every wire touching a specific event), category, venue, or detection type (news_cycle, cross_venue_divergence, benchmark_drift, volume_...

Parameters* required

categorystring

Signal category tag (case-insensitive): VS_BENCHMARK_DRIFT | CROSS_VENUE_DIVERGENCE | VOLUME_SPIKE | MOMENTUM_REPRICING | PRE_EVENT_PRICING. For thematic filtering use list_events.

detection_pathstring

one of news_cycle · cross_venue_divergence · benchmark_drift · volume_spike

event_idstring

Return only wires that target or link to this CM event_id.

limitinteger

default: 30

venuestring

one of kalshi · polymarket

get_signalFetch one full CM Signal wire by slug: headline, the 3-5 structured bullets, atomic claims with per-field provenance tiers, the target + linked events, primary and related markets with prices, and sources. Use when you have a wire slug (from list_signals) and need the complete...1 params

Fetch one full CM Signal wire by slug: headline, the 3-5 structured bullets, atomic claims with per-field provenance tiers, the target + linked events, primary and related markets with prices, and sources. Use when you have a wire slug (from list_signals) and need the complete...

Parameters* required

slug*string

Wire slug, e.g. "us-iran-nuclear-deal-before-2027-polymarket-77-2026-05-29".

Readme

ClearMarket

Institutional reference layer for prediction market data. Structures, classifies, grades, and links markets across Polymarket and Kalshi so research, risk, and data teams can use them like any other asset class.

Live now: clearmarket.fyi · REST api.clearmarket.fyi/v1 · MCP api.clearmarket.fyi/mcp · daily wire feed at /signals. Open and read-only — no key required.

Coverage: the live Kalshi + Polymarket universe (untraded placeholder slots excluded; counts on the site refresh with each ingest). Every market carries a Resolution Clarity Grade (RCG A/B/C) and full source provenance — the resolution source is named where the venue commits to one, and where it doesn't, that absence is classified and graded (that gap is the point). Markets listing the same question on both venues carry cross-venue links. Prices refresh hourly.

v0.2 · June 2026

Quickstart

No key, no signup — open and read-only.

# REST — search the graded universe
curl -s "https://api.clearmarket.fyi/v1/events?q=fed"

View the full README on GitHub

Details

Repository: github.com/jdsource/clearmarket
Website: clearmarket.fyi
Category: Data & Analytics
Transport: HTTP
Registry: MCP registry, active
Tools verified: Nov 6, 2026

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